.TH std::extents::fwd-prod-of-extents 3 "2024.06.10" "http://cppreference.com" "C++ Standard Libary"
.SH NAME
std::extents::fwd-prod-of-extents \- std::extents::fwd-prod-of-extents

.SH Synopsis
   constexpr std::size_t rank_type /*fwd-prod-of-extents*/(          (since C++23)
   rank_type i ) const noexcept;                                     (exposition only*)

   Returns the product of the sizes of extents with index less than i. The behavior is
   undefined if i <= rank() is false.

.SH Parameters

   i - The end index of the range of extents to be multiplied together.

.SH Return value

   If i > 0 is true, return the product of extent(k) for all k in range [0, i),
   otherwise 1.

.SH Example

    This section is incomplete
    Reason: no example

.SH See also

   rev-prod-of-extents returns the product of extents size in range [i + 1, rank())
                       (exposition-only member function*)

.SH Category:
     * Todo no example
